Horse-power hoist.



A.- M. SMITH.

HORSE POWER HOIST.

APPLICATION FILED NOV. 1, 1909.

959,630., Patented May 31,1910.

4SHEBTS-SHBET l. 3? 4 Witnesses, llzveldol f 6 6 ja mmm A. M. SMITH.

HORSE POWER HOIST.

APPLIOATION FILED NOV. 1, 1909.

4 SHEETS-SHEET 21 0 1 9 1 1h 3 W M d e t n. m a P ANDREW a GRAHAM an A.M. SMITH.

HORSE POWER HOIST.

APPLICATION FILED NOV. 1, 1909.

959,630w Patented May 31, 1910.

4 sums-sum s.

Fiyzfi 4 x %6l W m w 22 4? g 4 I I M M C0 FNQTDJJYHOGFAPGPS, WASHINGTON,Dv C.

A. M. SMITH.

HORSE POWER HOIST.

APPLICATION FILED Nov. 1, 1909.

Patented May 31, 1910.

4 SHEETS-SHEET 4.

ifmez ADAM M. SMITH, 0F MINNEAPOLIS, MINNESOTA.

HORSE-POWER. HOIST.

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Specification of Letters Patent.

Patented May 31, 1910.

Application filed. November 1, 1909. Serial No. 525,682.

To all whom it may concern:

Be it known that I, ADAM M. SMITH, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful 1m rovements in Horse-Power Hoists; and do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My present invention has for its especial object to provide an improvedhorse power hoist, but most of the features thereof are capable ofgeneral use in horse power mechanism.

The invention consists of the novel de vices and combinations of devicesherein after described and defined in the claims.

Generally stated, this invention is in the nature of an improvement onthe mechanism disclosed and claimed in my prior patent entitledHorse-power and hoist, No. 845,201, issued of date February 26, 1907.

Chiefly, the present invention is directed to the improved features ofconstruction especially adapting the horse power for use in connectionwith a pair of reversely movable counterbalancing cars or load-carryingdevices.

From a broad point of view, the present improved horse power hoist bearsclose resemblance to and, in some respects, is identical with the horsepower mechanism disclosed and broadly claimed in my said prior patentand, hence, such analogous parts will be herein but briefly described.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings, Figure l is a plan view of the improved horsepower mechanism, some parts being broken away; Fig. 2 is a transversevertical section taken approximately on the line x 00 of Fig. 1, someparts being shown in full; Fig. 3 is a detail, partly in plan and partlyin horizontal section, showing one of the two reversely acting cabledriving clutches; Fig. 4 is a transverse section taken on the line 02 mof Fig. 3; Fig. 5 is a transverse section taken on the line m 00 of Fig.3; and Fig. 6 is a view in elevation, with some parts broken away andsome parts sectioned, showing an improved ar "angement of thecounterbalancing reversely movable hoisting cars and 00- operatingguides and cable connections thereto.

A large horizontally disposed drive wheel 1 is rotatively mounted on thehub of a heavy upright tubular center bearing 2 which, at its lower end,is rigidly supported by a framework 3. The said drive wheel is provided,at its lower edge, with a large annular bevel gear 4: and with aprojecting annular flange 5, which latter works between verticallyspaced guide wheels 6 mounted in suitable bearings on the framework 8.These guide wheels 6 serve to support the drive wheel at its peripheralportion.

Mounted in suitable bearings 9, secured on the framework 3, and extendeddiametrically through the lower portion of the fixed center bearing 2and the projecting bearings thereon, is a countershaft 10 pro vided, atone end, with a bevel pinion 11 that meshes with the large annular gear1 of the drive wheel. Loosely journaled on the countershaft 10, one oneach side of the center bearing, is a pair of cable driving drums 12provided on their inner faces with cylindrical cavities in which splitspring clutch rings 13 are arranged to work. Secured on the countershaft10, adjacent to the inner face of each cable driving drum 12, is adriving hub 14; provided with an eccentric hub 15 in which is journaledsmall clutch actuating rock shafts 16. At their inwardly projectingends, the rock shafts 16 are provided with projecting arms 17, and theother ends 18 of the said rock shafts are flattened or made angular andare interposed between the adjacent ends of the cooperating springclutch rings 13. At their free ends, the arms 17 are provided withhearing shoes, preferably afforded by the heads of screws 19 adjustablysecured to the said arms with their said heads arranged to be engaged bycam acting collars 20 slidably mounted on the countershaft 10 andprovided with beveled outer ends. The two cam hubs 20 are provided withannular grooves that are engaged by pronged arms 21 of a clutchreversing rod or bar 22, which latter is mounted to slide diametricallythrough the center bearing 2 just above the shaft 10. At its centralportion, the reversing rod 22 is engaged by the depending end of a bellcrank 23 pivotally mounted within the tubular center bearing 2, with itsshort upper arm pivotally connected to the lower end of a plunger 24arranged to slide vertically and axially through the upper end portionof the center bearing. The upper end of the plunger 24 is connected toone arm of a bell crank 25 mounted in a suitable bearing on the platform7 and havin its other arm connected by a rod 26 to a latch lever 27,which latter is pivotallyconnected to and cooperates with a lock segment28 rigidly secured on the said platform 7 In the present mechanism, asin my prior patent, motion is communicated to the drive wheel orturntable 1 from a telescopically extensible sweep 29, provided at itsinner end with an extension bar 29" and a head 30 journaled on the upperend of the center bearing 2, and through a cooperating flexible clampingband 31, preferably of spring steel, one end of which is pivotallyconnected to said sweep at 32 and the other end of which is pivotallyconnected to one arm of a bell crank 33 that is also pivotally connectedto said sweep. The other arm of said bell crank 33 is connected by a rod34 to a latch lever 35 that cooperates with the latch segment 36 rigidlysecured on the platform 7, which is carried by the reach extension bar29 The clamping band 31 surrounds and is frictionally engageable withthe upper peripheral portion of the said drive wheel. To the extremeouter end of the sweep 29, a so-called hitch lever 37 is intermediatelypivoted and the rear end thereof is connected by a link or coupling rod38 to the clamping band 31 at a point 39, which point is on the sameside of the sweep as the bell crank 33, but is quite distant therefrom.Vhen the sweep 29 is made adjustable, the link 38 should also be madeadjustable so as to maintain, at all times, the proper relative lengthof the said two parts. In all positions of the said parts, theadjustments thereof should be such that, when a horse is hitched to thefront end of the hitch lever 37 and is driven in the proper direction torotate the drive wheel, to-wit, in the direction indicated by the arrowmarked on Fig. 1, the draft strain, when the clamping band is set uponthe drive wheel, will exert a force tending to hold the clamping bandmore tightly set.

To prevent backward rotation of the drive wheel or turntable 1, it isprovided, at its lower portion, with internal ratchet teeth 40 that areengaged by a spring pressed retaining pawl 41 mounted on the framework1, as best shown in Fig. 1. The driving cable 42 is given several wrapsaround each of the driving drums 12 and is passed around a largehorizontally disposed idle guide sheave 43 suitably journaled on theframework 3 in posit-ion to properly guide the cable to and from thesaid drums, as shown in Figs. 1 and 2. Then the cable is used to supportand reversely move the counterbalancing elevator cars, it is extendedover suitable guides and connected to the said cars, preferably as shownin Fig. 6.

Referring to Fig. 6, the numeral 44 dicates the elevating and hoistingcars whlch are guided for vertical movements by upright guide columns45, shown as secured, at their lower extremities, to a base bar 46 and,at their upper extremities, to a top bar 47. From the cars 44, thecables 42 are passed over upper guide sheaves 48 mounted on suitablebearings on the top bar 47, and from thence said cables run downward andunder lower guide sheaves 49 mounted in suitable bearings 50 secured tothe base bar 46. From the said sheaves 49, the cable runs to the drums12, as already indicated. A driver seat 8 is also carried by the reachextension bar 29 In the use of this improved hoist or elevatormechanism, in the erection of high buildings, it is necessary, from timeto time, as the building is built higher and higher, to increase theheight of the car guiding columns and, to facilitate this adjustment, Ipreferably form the said columns each of a multiplicity of tubularsections connected at their abut-ting ends by telescoped joint bolts ordowel pins 51. The upper and lower tubular sections may be secured tothe bars 47 and 46 in any suitable way.

The operation of the device is probably obvious from the foregoingdescription, but the following brief summary thereof is consideredadvisable.

hen the sweep 29 is rotated around the center bearing, by the travel ofthe horse hitched to the hitch lever 37, the clamping band 31 willalways move therewith. When it is desired to throw the cable intoact-ion, for the purpose of moving the hoisting or elevating cars, theclamping band 31 is tightened on to the flange of the drive wheel orturntable 1 by manipulation of the latch lever 35. By manipulation ofthe latch lever 27, either one of the driving drums 12 may be coupled tothe countershaft 10, which shaft is driven through the gear 4 and pinion11, when the driving wheel 1 is rotated. When the right hand drivingdrum 12, as viewed in Fig. 1, is coupled to the said countershaft, theleft hand car 44, as viewed in Fig. 6, will be raised and the right handcar will be lowered. Conversely, when the left hand driving drum 12 iscoupled to said countershaft, the right hand car 44 will be raised andthe left hand car will be lowered. The weight of these two cars, ofcourse, counterbalance each other, thus reducing to a minimum the amountof energy required to raise any load.

The manner in which either of the driving drums 12 is coupled to theshaft 10 is as follows :VVhen the reversing rod 22 is moved toward theright, for example, in respect to Fig. 3, the cam sleeve 20, acting onthe bearing foot 19 of the lever 17, rocks the shaft 16 and causes theangular end 18 thereof to further separate the ends of the cooperatingclutch band 13, thereby expanding the said clutch band into frictionalengagement with the cooperating seat in the said driving drum. WViththis arrangement of clutch actuating and reversing device, it is evidentthat the two driving drums will be alternately thrown into engagementand that the one will be thrown out of action simultaneously with thethrowing of the other into action. The hoisting cars may, however, atany time, be brought to a standstill without stopping the horse or themovement of the sweep, simply by throwing the lever forward, therebycausing the bell crank 33 to release the clamping band 31 fromengagement with the cooperating flange of the driving wheel 1. Also, bymanipulation of the lever 35, the clamping band 31 may be set under anydesired tension on the driving wheel and thereby used as a brake tocontrol the downward movement of a loaded car, when desired.

hat I claim is:

1. In a horse power mechanism comprising a sweep, a horizontallydisposed driving wheel, means for connecting said sweep and wheel atwill, a pair of cable driving drums located beneath and covered by saiddriving wheel, means for alternately driving said drums from saiddriving wheel, and a cable working on and arranged to be driven inreverse directions by said drums.

2. In a horse power mechanism, the combination with a sweep, a drivingwheel mounted on a center bearing, and means for connecting said sweepto said wheel at will, of a counter shaft driven from said drivingwheel, a pair of cable driving drums loosely journaled on saidcountershaft, clutches for connecting said drums to said shaft, a clutchreversing mechanism operative on said clutches to alternately connectsaid drums to said countershaft, and a cable working on and arranged tobe reversely driven by said drums.

3. A horse power mechanism comprising a sweep and a driving wheelmounted on a common center bearing, means for connecting said sweep tosaid wheel at will, a horizontal countershaft driven from said drivingwheel, a pair of cable driving drums loosely journaled on saidcountershaft, clutches with connections for alternately connecting saiddrums to said countershaft, a horizontally disposed idle guide sheave inthe vicinity of said drums, and a cable working around said drums andpassed around said idle sheave, the latter serving to receive the cablefrom the one drum and to guide the same to the other drum.

4. In a horse power mechanism, the combination with a driving wheelmounted on an upright center bearing, of a horizontal countershaftdriven from said driving wheel, cable driving drums loosely journaled onsaid countershaft, clutches for connecting said drums to saidcountershaft, a. clutch reversing lever carried by said driving wheeland having connections to said clutches for alternately rendering thesame operative, a cable arranged to run over and to be reversely drivenby said drums, a sweep, a.

clamping band frictionally engageable with said driving wheel andconnected to said sweep at one end, a lever carried by said sweep andconnected to the other end of said clamping band, and a second levercarried by said driving wheel and connected to the lever at the end ofsaid clamping band, for connecting said sweep to said driving wheel atwill.

5. I11 a horse power mechanism, the combination with an upright tubularcenter bearing, of a driving wheel and a sweep journaled on said centerbearing, said driving wheel having an annular gear, of a counter shaftextended through the lower portion of said center bearing and providedwith a pinion meshing with said annular gear, means for connecting saidreach to said driving wheel at will, cable driving drums looselyjournaled on said countershaft, one on each side of said center bearing,clutches for connecting said drums to said countershaft, a lever carriedby said reach, a clutch reversing rod mounted to slide through the lowerportion of said tubular center bearing, a bell crank within said tubularcenter bearing having its lower arm connected to said reversing rod, aplunger connected to the other arm of said bell crank and extendedupward through said center bearing, a bell crank above said centerbearing having one arm connected to the upper end of said plunger, and alink connecting the other arm of said upper bell crank to said lever,substantially as described.

6. In an elevator or hoist, the combination with a car, of guide columnstherefor made up of tubular sections and bolts or dowel pins telescopedinto the abutting ends of said tubular sections and making the saidcolumns extensible, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

HARRY D. Kinconn. F. I). MERCHANT.

